# SDR KCSA2019072408

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 24, 2019
- Submitted: July 26, 2019
- Operation: Air carrier
- Aircraft: N739DH
- Make and model: Boeing 767324
- Aircraft serial: 27392
- Aircraft time: 88,608 hours, 16,764 cycles
- System (JASC): [4950 · APU Bleed Air System](https://openairdocs.org/jasc/4950)
- Part: Control Valve
- Condition: Malfunctioned
- Location: Apu
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/KCSA2019072408

## Discrepancy

AT 1800 FT ON FINAL APPROACH INTO CVG, WHEN SELECTING FLAPS 30, THE LEFT AL BUS FAILED. REMOVED AND REPLACED APU SURGE CONTROL VALVE IAW AMM 49-53-01 ALL CHECKS GOOD.

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